Electrically driven zoom lens barrel

ABSTRACT

An electrically driven zoom lens barrel is provided with an indicating plate for indicating whether a zooming operation is being carried out in an electric mode or a manual mode. The indicating plate is provided separately from a zooming operation ring, which is moved forward to rearward to switch a zooming operation between the electric mode and the manual mode. The indicating plate displays the manual mode when the zooming operation is carried out in the manual mode, and displays the electric mode and a zooming direction when the zooming operation is carried out in the electric mode.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to an electrically driven zoom lens barrelby which a zooming operation can be switched between a manual mode andan electric mode, in which the zooming operation is electricallypowered, and more particularly, relates to an indicating device for theelectrically driven zoom lens barrel.

2. Description of the Related Art

In this kind of electrically driven zoom lens barrel, conventionally, anindication of a manual mode and an electric mode, and an indication ofan operating condition in the electric mode, are displayed by anoperating member used for a zooming operation. The position at whichthis operating member can be mounted, however, is restricted, due to amechanism thereof, and therefore, sometimes this operating member mustbe located at a position at which the display, by the operating member,cannot be easily and clearly seen. Further, in a conventional device,since a switching member for switching between the electric mode and themanual mode, and a zooming member for an electrical operation and amanual operation, are provided, separately, it is difficult to see bothof these members at the same time, and thus a mistake in the operationmight be made.

SUMMARY OF THE INVENTION

Therefore, an object of the present invention is to provide anelectrically driven zoom lens barrel in which a distinction between theelectric mode and the manual mode, and a zooming direction in theelectric mode, are indicated together at a position at which they can beeasily seen.

According to the present invention, there is provided an electricallydriven zoom lens barrel comprising a moving mechanism, an electricoperating mechanism, a manual operating mechanism, a control mechanism,and an indicating member. The moving mechanism moves the lens groupsprovided in the zoom lens barrel, to thereby carry out a zoomingoperation. The moving mechanism is electrically operated by the electricoperating mechanism and is manually operated by the manual operatingmechanism: The control mechanism selectively actuates one of theelectric operating mechanism and the manual operating mechanism: Theindicating member indicates whether zooming is carried out by theelectric operating mechanism or the manual operating mechanism, and isprovided separately from the control mechanism.

Further, according to the present invention, there is provided anelectrically driven zoom lens barrel comprising a switching member, azooming operation member, and an indicating member. The switching memberis provided for switching between the electric mode and the manual mode,the zooming operation member is provided for carrying out a zooming bythe electric mode or the manual mode, and the indicating member isprovided separately from the switching member and the zooming operationmember. The indicating member indicates the manual mode when theswitching member is switched to the manual mode, and indicates theelectric mode and the zooming direction when the switching member isswitched to the electric mode.

Still further, according to the present invention, there is provided anelectrically driven zoom lens barrel characterized in that an indicatingmember is provided separately from the mechanisms for carrying out thezooming operation and the switching between the electric mode and themanual mode. The indicating member indicates the manual mode when thezooming operation is carried out in the manual mode, and the electricmode and the zooming direction, when the zooming operation is carriedout in the electric mode.

BRIEF DESCRIPTION OF THE DRAWINGS

The present invention will be better understood from the description ofthe preferred embodiments of the invention set forth below, togetherwith the accompanying drawings, in which:

FIG. 1 is a sectional view of an electrically driven zoom lens barrel ofa first embodiment of the present invention, in which the zoom lens isin a wide-angle state;

FIG. 2 is a sectional view of the first embodiment, in which the zoomlens is in a telephoto state;

FIG. 3A is a plane view showing a main part of a neutral position returnmechanism when the switch ring is in a neutral position;

FIG. 3B is a plane view showing a main part of the neutral positionreturn mechanism when the switch ring is in a zooming position;

FIG. 4 is a block diagram showing a control circuit of a motor;

FIG. 5A is an extended plane view showing a main part of a switch ringin a manual zooming position;

FIG. 5B is an extended plane view showing the main part of the switchring in a power zooming position;

FIG. 5C is an enlarged view of mode indicating window and the indicationplate visible therethrough according to the first embodiment of thepresent invention;

FIG. 6 is a perspective view showing the electrically driven zoom lensbarrel of the first embodiment;

FIG. 7 is a perspective view showing an electrically driven zoom lensbarrel of a second embodiment;

FIG. 8 is a block diagram of the second embodiment; and

FIG. 9 is a plane view showing examples of indications made by a liquidcrystal display.

DESCRIPTION OF THE PREFERRED EMBODIMENTS

The present invention will now be described with reference to theembodiments shown in the drawings. In this embodiment, the presentinvention is applied to a two-lens group type electrically driven zoomlens.

FIG. 1 shows a first embodiment of the present invention, in which thezoom lens is in a wide-angle state. Namely, a front lens group L1 isfixed to a front frame 11, which is threadingly fitted to a helicoidring 12 through a helicoid H. The front frame 11 is provided with astraight guide projection 11a which is engaged with a straight guidegroove 13a formed on a focus ring 13 and extending along the opticalaxis.

A rear lens group L2 is fixed to the rear frame 14. A pin (not shown)provided on the rear frame 14 is engaged with a cam groove (not shown)formed on a cam ring 15, and similarly, a pin (not shown) provided on astop moving ring 16 is engaged with a cam groove (not shown) formed onthe cam ring 15. The cam ring 15 is rotatably supported on an innersurface of a stationary cylinder 17, and the rear frame 14 is fitted toan inner surface of the stationary cylinder 17. The rear frame 14 andthe stop moving ring 16 are supported by a straight drive guidemechanism (not shown), provided between the stationary ring 17 and therear frame 14 and the stop moving ring 16, and thus are moved onlylinearly along the optical axis relative to the stationary cylinder 17.Therefore, when the cam ring 15 is rotated about the optical axis, therear frame 14 and the stop moving ring 16 are moved linearly along theoptical axis, in accordance with a relationship determined by the camgrooves formed in the cam ring 15. The stop moving ring 16 is providedwith stop blades 18 and a light interruption ring 19. The stop blades 18are opened and closed by a stop lever 21 projecting backward from amount ring 20.

The helicoid ring 12 is provided with a cam groove (not shown) in whicha pin (not shown), fixed to the cam ring 15, is inserted. Accordingly,when the cam ring 15 is rotated about the optical axis, the front frame11, which is guided by the straight guide groove 13a, is moved linearlyalong the optical axis through the helicoid ring 12. Namely, when thecam ring 15 is rotated, the front lens group L1 and the rear lens groupL2 are moved along the optical axis while the distance therebetween ischanged in accordance with a predetermined relationship, whereby azooming operation is carried out.

The cam ring 15 is rotated together with the stationary (in the axialdirection) cylinder 17, by a motor 22 fixed to an inner surface of thezoom lens barrel, but the cam ring 15 also can be rotated by a manuallever 23 projecting radially therefrom.

The focus ring 13 is rotated by an autofocus shaft 24 having a rear endjoint portion 24a which coincides with a surface of the mount ring 20and is connected to a drive shaft (not shown) provided in the camerabody, whereby the autofocus shaft 24 is rotated by the drive shaft aboutthe axis of the shaft 24. A gear 24b formed on a front end of theautofocus shaft 24, is engaged with a gear 13b formed on an innersurface of the focus ring 13. Therefore, when the autofocus shaft 24 isrotated, the focus ring 13 is also rotated, whereby the front frame 11is rotated together with the focus ring 13 by an engagement of thestraight guide groove 13a and the straight guide projection 11a. Whenthe front frame 11 is rotated, the front lens group L1 is moved alongthe optical axis through the helicoid H, whereby a focusing operation iscarried out.

A stationary cylinder 25 is located outside the focus ring 13. A zoomingoperation ring 26, a switch ring 27 and a manual zooming ring 28 arerotatably provided outside the stationary cylinder 25, respectively.

As shown in FIG. 2, the zooming operation ring 26 is provided, on aninner surface thereof, with two V-grooves A and B extending in ancircumferential direction, and the stationary cylinder 25 is providedwith a click ball 29 engageable with the V-grooves A and B, and urgedoutward by a flat spring 30. The zooming operation ring 26 can be movedalong the optical axis between the two positions at which the click ball29 is engaged with the V-groove A or B, and is firmly held at thesepositions.

The switch ring 27 is provided with a return pin 31 (FIG. 1) and a brushpin 32 (FIG. 2) which project inwardly through holes formed in thestationary cylinder 25.

The return pin 31 is a component of a neutral position return mechanismNR as shown in FIGS. 3A and 3B, and is engaged with a pair of returnsprings 33 fixed to the stationary cylinder 25 in such a manner that thespring forces of these springs 33 are imposed on opposite sides of thereturn pin 31, so that when the switch ring 27 is not subjected to anexternal force, the return pin 31 and the switch ring 27 are returned tothe neutral position N. The return springs 33 are provided at symmetricpositions about the return pin 31, and center coil portions 33a of thereturn springs 33 are fitted to pins 34, respectively, and leg portions33b and 33c of the return springs 33 are engaged with the return pin 31and a pin 35, respectively. The leg portions 33b are also engaged with aneutral pin 36 facing the return pin 31. The pin 34, the pin 35, and theneutral pin 36 are fixed to the stationary cylinder 25.

As shown in FIG. 2, the brush pin 32 has a brush 37 fixed to an endthereof, and the brush 37 is in contact with a code plate 38 provided onan inner surface of the stationary cylinder 25. The brush 37 and thecode plate 38 are provided for sensing a direction and an amount ofrotation of the switch ring 27 from the neutral position N. signalsoutput from the brush 37 and the code plate 38 are inputted to a motorcontrol circuit 40 connected to the motor 22, as shown in FIG. 4. Themotor control circuit 40 receives the signals denoting the direction andamount of rotation of the switch ring 27, and controls the direction andspeed of rotation of the motor 22 through a rotation direction controlcircuit 40a and a speed control circuit 40b provided in the motorcontrol circuit 40.

The manual zoom ring 28 is provided between the stationary cylinder 25and a cover ring 42 provided at the rear end of the stationary cylinder25. A front end of the manual zoom ring 28 is in contact with a stepportion formed on an end surface of the stationary cylinder 25, and arear end of the manual zoom ring 28 is in contact with the cover ring42. Thus, the movement of the manual zoom ring 28 along the optical axisis restricted. The manual zoom ring 28 also is provided with a straightgroove 28a on an inner surface thereof, with which the manual lever 23is engaged. The straight groove 28a is provided only to facilitate theassembling of the zoom lens, and does not allow the manual lever 23 andthe manual zoom ring 28 to move along the optical axis.

As shown in FIGS. 5A and 5B, a selective engagement mechanism 44 (or aclutch mechanism) is provided for the zooming operation ring 26, theswitch ring 27, and the manual zooming ring 28. This selectiveengagement mechanism 44 is constructed by providing the zoomingoperation ring 26 with notches 26a on an end portion thereof and closeto the switch ring 27, which is provided with a projection 27aengageable with and disengageable from the notches 26a, and providingthe zooming operation ring 26 with notches 26b on an end portion thereofand close to the manual zooming ring 28, which is provided with aprojection 28b engageable with and disengageable from the notches 26b.The notches 26a and notches 26b are equidistantly formed along theperiphery of the end portion of the zooming operation ring 26,respectively.

The projection 27a and one of the notches 26a, and the projection 28band one of the notches 26b, are not engaged with each other at the sametime. Namely, when the zooming operation ring 26 is moved forward sothat the click ball 29 is engaged with the V-groove B, the projection27a and one of the constant interval notches 26a are engaged with eachother as shown in FIGS. 2 and 5B. Conversely, when the zooming operationring 26 is moved backward so that the click ball 29 is engaged with theV-groove A, the projection 28b and one of the constant interval notches26b are engaged with each other as shown in FIGS. 1 and 5A.

An indicating plate 50 is slidably provided on the switch ring 27 andclose to the zooming operation ring 26. As shown in FIGS. 5A and 5B, theindicating plate 50 is provided with a plurality of guide grooves 51extending in parallel to the optical axis, and guide pins 52 fixed tothe switch ring 27 are engaged in the grooves 51 respectively. Thus theindicating plate 50 is movable on the switch ring 27 and along the guidegrooves 51 and within an effective length thereof. A spring 53 issupported on the switch ring 27 by a pin 54 and urges the indicatingplate 50 backward, i.e., toward the zooming operation ring 26. A manualmode indication 55 and an electric mode indication 56 are engraved onthe indicating plate 50 in such a manner that the positions thereof, inthe forward and backward directions, are different. The electric modeindication 56 includes a mark "L" (a long focal length), a mark "S" (ashort focal length), and arrows indicating the zooming directions.

The manual mode indication 55 and the electric mode indication 56 areexposed through a mode indicating window 57 formed in the stationarycylinder 25. Namely, the manual mode indication 55 is exposed in themode indicating window 57 when the indicating plate 50 is urged backwardby the spring 53, and the electric mode indication 56 is exposed thereinwhen the indicating plate 50 is urged forward. The indicating plate 50is moved forward by a front end portion of the zooming operation ring26, when the zooming operation ring 26 is moved forward and pressesagainst the indicating plate 50.

As shown in FIG. 5C, a peripheral portion of the mode indicating window57 is provided with a speed scale 58 which includes "0", "Lo" and "Hi"and indicates an amount of rotation from the neutral position of theindicating plate 50 (the zooming operation ring 26). The electric modeindication 56 is provided with a speed indicator 56a facing the speedscale 58.

Note that, as shown in FIG. 6, a stop scale ring 45 is located at a rearportion of the cover ring 42 and a distance scale window 46 is formed inthe stationary cylinder 25, whereby a distance scale 49, provided on anouter surface of the focus ring 13 can be observed through the distancescale window 46. A focal length window 47 is formed in the cover ring42, in which a focal length scale 47a, provided on an outer surface ofthe manual zooming ring 28, can be observed. As shown in FIGS. 1 and 2,a rotation restriction projection 48 is fixed to the stationary cylinder25, and engaged with a groove 13c formed on an outer surface of thefocus ring 13, and extending for a predetermined angle, whereby therotation range of the focus ring 13 is restricted.

An operation of this embodiment is described below.

When the zooming operation ring 26 is moved rearward, and accordingly,the click ball 29 is engaged with the V-groove A, the electricallydriven zoom lens barrel is set to the manual mode. In this state, asshown in FIG. 5A, one of the constant interval notches 26b is engagedwith the projection 28b, so that the zooming operation ring 26 andmanual zooming ring 28 are connected to each other and rotate as asingle body. Accordingly, if the zooming operation ring 26 is rotated,the cam ring 15 is rotated through an engagement of the straight groove28a and the manual lever 23, and accordingly, a zooming operation iscarried out.

In this condition, as shown in FIGS. 5A and 6, the manual modeindication 55 of the indicating plate 50 is displayed in the modeindicating window 57, and thus it can be clearly seen that the manualmode is set.

Conversely, if the zooming operation ring 26 is moved forward, andaccordingly, the click ball 29 is engaged with the V-groove B, theelectrically driven zoom lens barrel is set to the electric mode. Inthis state, as shown in FIG. 5B, and end portion of the zoomingoperation ring 26 presses against the indicating plate 50 and compressesthe spring 53, and accordingly, the electric mode indicating 56 of theindicating plate 50 is displayed in the mode indicating window 57, andtherefore, it can be clearly seen that the electric mode is set.

In this condition, the projection 26a of the zooming operation ring 26and one of the constant interval notches 27a are engaged with eachother, and accordingly, the zooming operation ring 26 and the switchring 27 are connected to each other and rotate in the same direction asa single body. If the switch ring 27 is rotated in one direction fromthe neutral position N by the zooming operation ring 26, the brush 37and the code plate 38 sense the direction of rotation, and accordingly,the rotation direction control circuit 40a of the motor control circuit40 drives the motor 22 to rotate in the forward or reverse direction.Namely, the zooming direction to the tele-photo state or wide-anglestate are controlled by a direction of rotation of the zooming operationring 26. The brush 37 and the code plate 38 also sense an amount ofrotation of the switch ring 27, i.e., the zooming operation ring 26, 26.Thus the larger the amount of the rotation, the higher the speed of themotor 22 is made by the speed control circuit 40b of the motor controlcircuit 40. When the motor 22 is driven, the cam ring 15 is rotated,whereby the front lens group L1, the rear lens group L2 and the stopmoving ring 16 are moved along the optical axis in a predeterminedrelationship. Thus a zooming operation is carried out.

The zooming direction is indicated by the marks "L", "S", and the arrowprovided on the electric mode indication 56 displayed at the modeindication window 57. The zooming speed is indicated in such a mannerthat either the "Lo" or "Hi" symbols of the speed scale 58 formed on aperiphery of the mode indicating window 57 is indicated by the speedindicator 56a of the electric mode indicator 56.

The zooming speed may be changed continuously or in steps. This speedchange can be freely carried out by setting the code of the code plate38 or by signals.

When the zooming operation ring 26 is rotated in the forward or reversedirection from the neutral position N, only one of the pair of returnsprings 33 is deformed as shown in FIG. 3B. Then, when the operationforce is released, due to a spring force of the leg 33b of the deformedreturn spring 33, the switch ring 27 is returned to the neutral positionN through the return pin 31 and the motor 22 is stopped. During thisreturn of the switch ring 27, the neutral pin 36 is engaged with the leg33b, to prevent an excessive deformation of the leg 33b and a rotationof the switch ring 27 beyond the neutral position N. The above-describedreturn operation is carried out in the same way whether the zoomingoperation ring 26 is rotated in the forward or the reverse direction(i.e., in the tele-photo or wide-angle direction).

The difference between the electric mode and the manual mode is that thecam ring 15 is rotated through the motor 22 or by the manual lever 23:either way, a zooming operation is carried out.

Note that, in the electric mode, the manual lever 23 is rotated togetherwith the cam ring 15, and thus the manual zooming ring 28 is rotated.Nevertheless, since the manual zooming ring 28 and the zooming operationring 26 are not engaged with each other, no problem occurs.

FIGS. 7 through 9 show a second embodiment of the present invention. Inthis embodiment, a liquid crystal display is used for displaying anindication that the zooming operation is being carried out in theelectric mode or the manual mode. Namely, a liquid crystal display 60 isprovided at a position corresponding to the position at which the modeindicating window 57 is provided in the first embodiment. Members suchas the indicating plate 50, the spring 53 and the pin 54 are omitted,and instead, as shown in FIG. 1, a code plate 61 and a brush 62 forsensing a position of the zooming operation ring 26 along the opticalaxis, i.e., for sensing whether a zooming operation is being carried outin the manual mode or the electric mode, are provided between thestationary ring 25 and the zooming operation ring 26. While FIG. 1 showsboth the code plate 61 and brush 62 of the second embodiment, as well asthe indication plate 50 of the first embodiment, in practice, only oneof these mechanisms will be incorporated in a particular lens.

A signal sensed by the code plate 61 and the brush 62, and denoting themanual mode or the electric mode, is inputted to an information processcircuit 65 as shown in FIG. 8. Data showing the zooming direction andzooming speed are outputted from the code plate 38 and the brush 37 andinputted to the information process circuit 65. This information is thendisplayed at the liquid crystal display 60 after passing through anindicating circuit 66.

FIG. 9 shows examples of the displays made by the liquid crystal display60, wherein D1 shows a display in which all of the indication patternsare shown, as an explanation; D2 shows a display in which the zoomingoperation is switched to the manual mode; D3 shows a display in whichthe zooming operation is switched to the electric mode; D4 shows adisplay in which the zooming operation is carried out in the electricmode, to a long focal length L at a low speed; D5 shows a display inwhich the zooming operation is carried out in the electric mode, to ashort focal length S at a low speed; D6 shows a display in which thezooming operation is carried out in the electric mode, to the long focallength L at an intermediate speed; D7 shows a display in which thezooming operation is carried out in the electric mode, to the long focallength L at a high speed; D8 shows a display in which the zoomingoperation is carried out in the electric mode, to the short focal lengthS at an intermediate speed; and D9 shows a display in which the zoomingoperation is carried out in the electric mode, to the short focal lengthS at a high speed.

In each of the above embodiments, the manual zooming ring 28 is providedfor transmitting a rotation of the zooming operation ring 26 to themanual level 23. However if the zoom lens barrel is constructed in sucha manner that, when the zooming operation ring 26 is moved rearward, thezooming operation ring 26 is directly engaged with the manual lever 23and they are thus connected and rotate in the same direction as a singlebody, the manual zooming ring 28 can be omitted.

Further, it is evident that the present invention is not related to aconstruction of the zooming mechanism. Namely, the present invention canbe applied to any device in which the motor 22 is rotated in a forwardor reverse direction in accordance with a forward or reverse rotation ofthe switch ring 27, so that a zooming operation is carried out, and themanual lever 23 is rotated in a forward or reverse direction so that thezooming operation is carried out mechanically (i.e., manually).

Although the embodiments of the present invention have been describedherein with reference to the accompanying drawings, obviously manymodifications and changes may be made by those skilled in this artwithout departing from the scope of the invention.

The present disclosure relates to subject matter contained in Japanesepatent application No.2-33017 (filed on Feb. 14, 1990) which isexpressly incorporated herein by reference in its entirety.

We claim:
 1. An electrically driven zoom lens barrel including lensgroups, by which a zooming operation is carried out, said electricallydriven zoom lens barrel comprising:means for moving said lens groups tothereby carry out a zooming operation; means for electrically operatingsaid moving means; means for manually operating said moving means; meansfor controlling a selective actuation of one of said electricallyoperating means and said manually operating means; and an indicatingmember indicating whether the zooming operation is carried out by saidelectrically operating means or said manually operating means, saidindicating member being provided separately from said control means. 2.An electrically driven zoom lens barrel according to claim 1, whereinsaid indicating member indicates a manual operating mode when thezooming operation is carried out by said manually operating means, andindicates the electric mode and a zooming direction when the zoomingoperation is carried out by said electrically operating means.
 3. Anelectrically driven zoom lens barrel according to claim 2, wherein saidindicating member further indicates the zooming speed when the zoomingoperation is carried out by said electrically operating means.
 4. Anelectrically driven zoom lens barrel according to claim 1, wherein saidelectrically operating means is provided with a motor for operating saidlens groups moving means, an electric circuit for rotating said motor,and a switch member rotated by said control means to thereby controlsaid electric circuit.
 5. An electrically driven zoom lens barrelaccording to claim 1, wherein said manually operating means is providedwith a manual zooming member rotated by said control means to therebyoperate said lens groups moving means.
 6. An electrically driven zoomlens barrel according to claim 1, wherein said electrically operatingmeans is provided with a motor for operating said lens groups movingmeans, an electric circuit for rotating said motor, and a switch memberrotated by said control means to thereby control said electric circuit,said manually operating means is provided with a manual zooming memberrotated by said control means to thereby operate said lens groups movingmeans, and said control means is provided with a zooming operationmember selectively engageable with one of said switch member and saidmanual zooming member.
 7. An electrically driven zoom lens barrelaccording to claim 6, wherein one of said zooming operation member andsaid switch member is provided with notches equidistantly spaced apartalong an end portion thereof, and the other of said zooming operationmember and said switch member is provided with a projection engageablewith said notches.
 8. An electrically driven zoom lens barrel accordingto claim 6, wherein one of said zooming operation member and saidmanually operating member is provided with notches equidistantly spacedapart along an end portion of the member, and the other of said zoomingoperation member and said manual zooming member is provided with aprojection engageable with said notches.
 9. An electrically driven zoomlens barrel according to claim 6, wherein said indicating member ispressed against and is moved by said zooming operation member, when saidzooming operation member is moved toward said indicating member.
 10. Anelectrically driven zoom lens barrel according to claim 1, wherein saidindicating member is provided close to said control means, and isprovided with indication symbols denoting the manual mode and theelectric mode and including a zooming direction.
 11. An electricallydriven zoom lens barrel according to claim 10, wherein said controlmeans is provided with a guide pin, and said indicating member isprovided with a guide groove in which said guide pin is engaged, in sucha manner that said indicating member is movable along said guide groove.12. An electrically driven zoom lens barrel according to claim 10,wherein said control means is provided with a spring urging saidindicating member in a direction corresponding to one of the electricmode and the manual mode.
 13. An electrically driven zoom lens barrelaccording to claim 10, further comprising means for displaying one ofsaid indication sysbols.
 14. An electrically driven zoom lens barrelwhich can be moved for a zooming operation in an electric mode and amanual mode, said electrically driven zoom lens barrel comprising:aswitching member for switching between said electric mode and saidmanual mode; a zooming operation member for carrying out a zoomingoperation in one of said electric mode and said manual mode; and anindicating member provided separately from said switching member andsaid zooming operation member; said indicating member displaying saidmanual mode when said switching member is switched to said manual mode,and displaying said electric mode and a zooming direction when saidswitching member is switched to said electric mode.
 15. An electricallydriven zoom lens barrel according to claim 14, wherein said indicatingmember indicates the zooming speed when the zooming operation is carriedout in said electric mode.
 16. An electrically driven zoom lens barrelaccording to claim 14, wherein said switching member and said zoomingoperation member are the same member.
 17. An electrically driven zoomlens barrel which can be moved for a zooming operation in an electricmode and a manual mode;characterized in that an indicating member isprovided separately from mechanisms for carrying out the zoomingoperation and a switching between said electric mode and said manualmode, and displays said manual mode when the zooming operation iscarried out in said manual mode, and displays said electric mode and azooming direction when the zooming operation is carried out in saidelectric mode.
 18. An indicator member for use with a zoom lens barrelwhich can be selectively moved for zooming in an electric mode and in amanual mode, said indicator member comprising selectively visibleindicating portions for displaying an indication of the electric mode ofmovement together with a zoom direction, when zooming is carried out inthe electric mode, and displaying an indication of the manual mode whenzooming is carried out in the manual mode.